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A comment on Water drinking acutely improves orthostatic tolerance in healthy subjects (2002). Parent comment

Re:Water drinking acutely improves orthostatic tolerance in ... by WillPostForFood on Thursday December 23, 2021 @03:15PM (#29665987)
During the Valsalva maneuver (i.e., exhaling against a closed glottis or bearing down as though to defecate), intrathoracic pressure increases and leads to increased arterial pressure as a result of increased afterload. It is easily done by having the patient take a deep breath, put their thumb in their mouth with closed lips, and attempt to exhale without expelling any air.
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